Groundhog Thread Part Deux - P-39 Fantasy and Fetish - The Never Ending Story (Mods take no responsibility for head against wall injuries sustained)

[FLYBOYJ]

 

[33k in the air]

That gets you to 5000ft, switch to drop tank is probably a bit earlier.

The switch was made at about 1,000 feet --- at least that's what I remember reading for P-51s.

 

[buffnut453]

I wonder if this book has any useful performance figures?

 

[FLYBOYJ]

"landing reserve" I did a quick word search in the manual and several flight training handbooks, I cannot find that term. Can anyone else point me in the direction where I can find a definition of that term?

 

[FLYBOYJ]

Where does this power come from?
Pixie dust?
Unicorn Poop?
Satanic rituals?
Groundhog mystical incantations?

 

[fubar57]

"landing reserve" I did a quick word search in the manual and several flight training handbooks, I cannot find that term. Can anyone else point me in the direction where I can find a definition of that term?

In my copy its under the third groundhog on the right

 

[GrauGeist]

"landing reserve" I did a quick word search in the manual and several flight training handbooks, I cannot find that term. Can anyone else point me in the direction where I can find a definition of that term?

All the information you need can be found in "Never Never land".

nev·er-nev·er land

noun
noun: never-never land

1. an imaginary utopian place or situation.

 

[wuzak]

"landing reserve" I did a quick word search in the manual and several flight training handbooks, I cannot find that term. Can anyone else point me in the direction where I can find a definition of that term?

I think he means the reserve fuel which is, of course, not just for landing.

I would have thought that the actual landing would not use a lot of fuel, since gravity is helping that process!

 

[FLYBOYJ]

I think he means the reserve fuel which is, of course, not just for landing.

I would have thought that the actual landing would not use a lot of fuel, since gravity is helping that process!

Yep! Gravity does save fuel! LOL!

 

[pbehn]

Read the directions in the pilot's manual and use the Flight information Instruction Chart, everything you need is in that chart. You don't need any other reference. There were four segments to an escort mission, takeoff and climb (20gal per the chart), combat for 20min, landing reserve 20min, with the rest of the fuel used for cruising.

Reserve for combat isn't based on 147gph, combat would take place at 25000' or so. Fuel burn at 25000' was 62gph at 2600rpm (normal power). Combat power was 3000rpm, I'm estimating 72gph so 20min would be 24gal. Plane would still climb at almost 2000fpm at 25000', phenomenal performance when compared to other fighter planes in 1943.

The Spitfire Mk IX entered service in 1942 rate of climb with 66 Merlin at 30,000ft 2,125ft/min with Merlin 70 2,600ft/min

Test in Oct 1942 Spitfire Mk IX Performance Trials

 

[fubar57]

Quit bringing up facts, they ruin the thread

 

[pbehn]

Quit bringing up facts, they ruin the thread

I am looking for the word above "phenomenal".

 

[fubar57]

I myself just looked up the word "parsimonious" for no other reason than it was used prodigiously in a National Lampoon story back in 1973 and I finally got around to finding out what it means

 

[GregP]

A landing reserve is a large plot of ground where airplanes can take off and land.

 

[XBe02Drvr]

I would have thought that the actual landing would not use a lot of fuel, since gravity is helping that process!

Gotta have enough for a bolter or three.

 

[pbehn]

Did anyone consider using the engine from a P-39N in a P-51B? Phenomenal performance and only a third of the fuel consumption in combat.

 

[XBe02Drvr]

noun
noun: never-never land

1. an imaginary utopian place or situation.

2. indigenous name for the albatross, which according to legend is capable of soaring perpetually, thus never needing to come down to earth.

 

[Shortround6]

Did anyone consider using the engine from a P-39N in a P-51B? Phenomenal performance and only a third of the fuel consumption in combat.

OK, they didn't stick it in a "B" airframe

 

[pbehn]

View attachment 632790

OK, they didn't stick it in a "B" airframe

Wow, what was it called?

 

[Peter Gunn]

"landing reserve" I did a quick word search in the manual and several flight training handbooks, I cannot find that term. Can anyone else point me in the direction where I can find a definition of that term?

I think this guy might be able to help you: